Knitting-machine.



vPATENTEDNov. 17, 1903.

l J. 0.1)UEMLER- KNITTING MACHINE. APPLIOAQTIONFILED JULY 19. 1902.

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Y PATENTBD Nov. 17, 1.903.

y J. G. DUEMLER.

KNITTING MACHINE.- APPLIUATIO I'ILEDIULY. 19, 19027.

N0 MODEL.

` neuron No. 744,311. PATENTE) NGV. 17, 1903.

J. C DUBMLBR. KNITTING MACHINE.

APPLIOATI' HLBD JULY 19. 190s.

No MODEL. a SHEETS-sum s.

' WITNESSES l f T01? v 'y WM- v W e A TTUHNE.

ivo. 744,31 1v.

UNITED STATES- `Jorim o. DUEMLER, orsoUTn BETHLEHEM,

-:Patented dvember 17,

PATENT OFFICE.

PENNSYLVANIA," ASSIGNOR TO SYLVANIA, COPARTNERS TRADING AS H. B'RINTON dz: CO.

MACHINE..

SPECFICATIYON forming part of Letters Patent No. 744,311, dated November 17', 1903.

Application filed July 19, 1992.

anism whereby various designs of knitted fabric may be produced.

z To this `.end the invention, as generally stated,- consists inthe employment of a plurality of thread-feedsand a series of needles in combination withmeans whereby a novel relative action betweenthe needles and the 2c stitches is edected, as willbe hereinafter particularly described and claimed.

.in the drawings, Figure 1 is a plan of a portion et a circular-knitting machine embedying my invention, certain parts being :5 emitted.. Fig. 2 is a vertical 4section thereof as on. the line i. ct Fig. 1, including the needie-cylinder, the needles, and thelatch-guard.

Fig. 3 is a development of a portion of the exterior of the cam-cylinder, the frame, and

zo the segmental cam. Fig. 4 is a vertical section thereof as on the line 4 4 of Fig. 3, in-

` clnding the needle-cylinder. Fig. 5 is a` sectional detail as on the line 5 5of Fig. 1. Fig.

6 isa diagrammatic view illustratinga development of the interior of the cam-cylinder and the positions of the parts during the knitting of the leg portion ofa stocking. 'Fig'.

7 is asimilar view showing the positions of the parts during the knitting of the foot portion of a stocking.: Fig. 8 is an enlarged view of apiece of fabric produced by my invention. l

1 designates the bed-plate, 2 the needlecylinder supported thereby, and 3 the camcylinder. The cam-cylinder has its bearings in the bed-plate and is provided Awith bevelteeth 4, with which coact the teeth of a bevel gearwheel 5, aftixed to the drivingshaft 6. The cam-cylinder is provided with Serial No. 116.137. (No model.)

v the usual cams, whiehinclude the oppositely- 5c disposed stitchcams 7 8 and the adjacent raising-cams 9 10, leading to the supportingledge 1l, thecams 9 and 10 being arranged in rear of the stitch-cams 7and 8, respectively, according to the direction of rotation of the cam-cylinder. The cam-cylinder is also provided with the usual picker device 12, by means of which certain needles are successively moved into and out'of action during the reciprocations of thecam-cylinder in 6o knitting the heel and toe portions of a stocklng.

. Thus far the machine is of well-known construction and needs no detailed description herein. 65

In the present embodiment of my invention I employ two sets of needles 12 13, which are alike in every respect except that the latches of the set 13 are longer than those of the set 12. These needles are arranged in the 7o relation indicated in Figs. 6 and 7. Arranged in the cam-cylinder 3 adjacent to the usualstitch-cams are an additional stitchcam 14 and a raising-cam 15, which in conjunction with 'stitch-cam Sactuate the needles to elfect the knitting offtwo rows of stitches into the fabric during each revolution of the cam-cylinder in the formation of the leg and 'foot portions of a stocking.

The cam-cylinder is provided in rear of the 8o stitch-cam 14 with a raising-cam 15, which raises the needles so that the latchesI of the needles 12 will escape their engaged loops of thread, and the cam-cylinder is provided with cams 40 and al, each of which is adapt- 85 ed to raise the needles so that all their latches will escape their engaged loops of thread, the cam 40 being arranged in advance of the stitch-cam 8, and the cam 41 being arranged in advance of the stitch-cam 7, according to 9o the direction 'of movement of the cam-cylinder.

The cam letiis mounted on astem l6,which projects through a boss 17 on the cam-cylindei-'and is held normally inward, as shown, 95 by the action 4of a spring 18. The outer end of the stem 16 is provided with a collar 19,in which is formed a V-shaped socket 20, which registers with a V-shaped projection 21 on the boss. By turning the collar 19 so that vthe socket 20 escapes the projection 21 the cam 14 is withdrawn or moved out of action to permit the cam-cylinder to be reciprocated during the formation of the heel and toe parts of the stocking.

The cam-cylinder is provided with the usual ring or latch-guard 22, containing eyes 23 24, adjacent the cams 8 14, respectively, whereby thread is directed to the needles at each stitch-cam. f

Mounted in th'efcam-cylinder 3, inv rear of the stitch-cam 8,is an elevatingcam25,which is movable above and below the ledge 11,. This cam 25 is formed on or secured to a block 26, which is slidingly titted to a vertical vslot 27 in the wall of the cam-cylinder. Projecting outwardly from the block 26 is a stud 28, which is provided on its free end with an antit'riction-roller 29, adapted to be acted upon by a cam 30, and thereby motte, the cam -25 above the ledge 11, for a purpose-r hereinafter described. The earn 25 is maintained normally depressed by the action of a suitable spring 31, arranged on the exterior of thecam-cylinderand bearing upon the stud 28. The cam 30is mounted on the bed-platel and comprises a segmental bar having a horizontal portion 32, which extends half-way around the cam-cylinder, and two inclined rportions 33 at the respective ends of the horizontal portion,whereby the roller29 is guided to and from the horizontal portion.

In order that the cam 30 may be raised into the path of the roller29orlowered therefrom, the cam is supported by screws 34,projecting from the bed-plate 1 and passing through slots 35 in the cam, the latter being provided with a pin 36, which is adapted to register with a socket 37 in the bed-plate,and thereby lock said earn in the vraised position. The pin pzoJects outwardly, as shown, and may be readily operated by hand and the cam 30 raised or lowered, as desired.

In Figs. 6 and 7 I have indicated by a line :u x the top of the wpeb or the plane where the loops are formed. t

Assuming that a white thread 38 is being delivered to the needles through the eye 24 at cam '14 and a black thread 39 through the eye 23 at cam 8, the operation of the-machine is as follows: During the knitting of the leg portion of a stocking the cam 30 is down and the cam 25 remains below the ledge 11. As the stitch-cam 8 passes the needles the latter are caused to engage and knit the black thread 39 into the fabric in the 4usual manner, and the elevating-cam 10 raises the needles tothe ledge 11. At this pbint the latches of the needles 12 are raised above and have escaped the black. loops just formed, as in or- -diary knitting, andthe longer latches of the needles 13 remain in said loops. The. needles are next acted upon by the stitch-cam 14, where the white thread 38 is delivered to the needles. At this point the needles i12, having their latches free, kuit the white thread into the fabric in the usual manner, and the needles 13, having their latchesA engaged by the black loops, merely draw down the black loops and the white thread together without knitting. The long-latched needles 13 ,are now embraced by both a white and black loop. As the cam-cylinder advances the needles are raised by the camv 40A suliiciently to cause the latches of the needles 13 to escape their white and blacl loops. The cam 8 now meets the needles again, and the latter, having all ltheir latches clear of the loops, knit the black thread into the fabric in the usual manner, the needles V13 drawing the black thread 39 down to form stitches and'at the same time casting ol their superposed loop of' the threads. Thus it will be seen that the needles 13 do not knit the white thread 38, but knit a chain of black stitches down the face of the fabric, thereby prod ucing a longitudinal stripe through the fabric at each point where the needles. 13 occur, the needles 12 knitting alternate blackand white transverse rows of stitches at right angles to and intersected by the longitudinal stripes. Afterthe completion of the leg portion of the stocking the`eam 14 is moved out of action, and the cam-cylinder is reciprocated to knit the heel, the needles being thrown into and out of aetion in the usual manner. During this operation the black thread is employed. In order to continue the longitudinal stripes along'the top of the foot portion of the stocking and omit said stripes from the bottom thereof, I

'employ the cam 30 andjust prior to commencing the knitting of the heel raise this cam to position indicated by dotted lines in Ijg.- 3. When the said cam occupies this position, the cam 25 is raised and lowered thereby during each successive revolution of the cam-cylinder and maintained elevated during one-half of each revolution. The cam 25 be- IIO ing thus elevated raises the needles in onei half vot' the needle-cylinder lsufficiently to cause the latches of the needles 13 to clear their loops, and thereby knit the thread into the fabric similarly to the needles 12. As the other half of the needles 13 are unaffected by the cam 25, they of course knit the longitudinal stripes in the fabric along the top of the foot portion ot' the stocking, as previously explained.

I claim- I 1. In a knitting-machine,-the combination with the needles having latches of dilerent lengths, their support, and plural threadfeeds, of means for actuating said needles to elect their operation-upon the threads, and means whereby certain of the needles, having latches over ya predetermined length, are caused to receive and retain superposed loops of the threads, and thereafter to receive and act upon one of the threads to produce stitches thereby, and at the same time to cast off the 'super-posed loops.

wi'th a plurality of sets of needles having latches of differentl lengths, their support, plural thread-feeds, the cam-carrier, actuating means therefor, and a stitch-cam for each thread-feed to eiect the operation of the needles upon the threads, of means carried by the cam-carrier in `rear of each stitch-cam whereby the latches of one setof needles are caused to escape their engaged loops ofthread, and means carried by the cam-carrier in advance of one of said stitch-cams whereby the latches of all the needles are caused to escape their engaged'loops of thread.

3. In a knitting-machine, the combination with a plurality of. sets of needles having.

latches of different lengths,

their support, plural thread-feeds,

ried by the cam-carrier whereby both sets of' needles are raised to disch-gage their latches from their loops ot thread, and meansfor moving the last-named cam into and out of 4. In a knitting-machine, thecombination with a needle-cylinder, a plurality of sets of needles having latches of different lengths," a cam-cylinder, its actuating means, plural thread-feeds, andl stitch-cams corresponding with its feeds, of a cam' carriedv by the camcylinder in rear of each stitch-cam whereby the needles are raised to disengage the latches of one set from theirengaged loops of thread a cam carried by the cam-,cylinder in advance of one of said stitch-cams whereby allthe needles are raised todisengage their latches from their loops of thread, a movable cam carried by the cam-cylinder whereby the respective sets of needles are raised to disengage their latches from their loops of thread, a projection on said movable cam, a cam with which said projection coacts during a partial revolution'of the cam-cylinder, and means for movi ing said last-named cam into and out of the path of said projection whereby-periodical action ot' said movable cam is eiected.

In testimony whereof I ax my signature in-presence of two Witnesses.

JOHN C. DUEMLER. Witnesses: Y

OSCAR J. MooNEY, M. J. MAssART. 

